11723730 has 16 divisors (see below), whose sum is σ = 28137024. Its totient is φ = 3126320.

The previous prime is 11723729. The next prime is 11723737. The reversal of 11723730 is 3732711.

It is a super-2 number, since 2×11723730² = 274891690225800, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11723730.

It is not an unprimeable number, because it can be changed into a prime (11723737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195366 + ... + 195425.

It is an arithmetic number, because the mean of its divisors is an integer number (1758564).

Almost surely, 2^11723730 is an apocalyptic number.

11723730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11723730 is an abundant number, since it is smaller than the sum of its proper divisors (16413294).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11723730 is a wasteful number, since it uses less digits than its factorization.

11723730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390801.

The product of its (nonzero) digits is 882, while the sum is 24.

The square root of 11723730 is about 3423.9932827037. The cubic root of 11723730 is about 227.1722446960.

The spelling of 11723730 in words is "eleven million, seven hundred twenty-three thousand, seven hundred thirty".